Make-up handler with direct expansion dehumidification

Details Make-up handler with direct expansion dehumidification Make-up handler with direct expansion dehumidification

1998-06-26

1999-11-30

Bennett, Henry

Refrigeration

Processes

Circulating external gas

62173, 621765, F25D 1706

Patent

active

059921617

ABSTRACT:
A make-up air handler controls temperature, humidity and/or cleanliness of air. The make-up air handler includes a direct expansion chiller system. The direct expansion chiller may be integral to the make-up air handler or remote. A clean room facility uses the make-up air handler to supply air to a clean room. The make-up air handler includes a primary cooling coil and a direct expansion chiller system, and may include a humidifier and a filter. The direct expansion chiller system includes an air stream cooling coil and an air stream heating coil. The heating and cooling coils use a refrigeration fluid which is compressed and circulated by a compressor. Humidity is controlled by removing moisture which is condensed from the air stream by a primary cooling coil and the air stream cooling coil of the direct expansion chiller system. The energy removed by the air stream cooling coil is reintroduced to the air stream by the air stream heating coil. The process of removing moisture directly removes contamination. The process of lowering humidity causes contaminant particles to form which can be removed by a filter.

REFERENCES:
patent: 3012411 (1961-12-01), Kjellman
patent: 5172565 (1992-12-01), Wruck et al.
patent: 5400607 (1995-03-01), Cayce
patent: 5493871 (1996-02-01), Eiermann

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